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A227592
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Number of nX4 0,1 arrays indicating 2X2 subblocks of some larger (n+1)X5 binary array having nonzero determinant
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1
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16, 256, 3840, 56928, 841984, 12420672, 182940432, 2693032800, 39634170368, 583231191264, 8581920953616, 126274620899072, 1857983333261344, 27337874035216704, 402240996868184512, 5918440689583411776
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OFFSET
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1,1
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COMMENTS
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LINKS
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FORMULA
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Empirical recurrence of order 63 (see link above)
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EXAMPLE
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Some solutions for n=4
..0..0..1..0....1..1..1..0....1..0..0..0....1..1..0..1....0..1..0..0
..1..1..1..1....1..1..0..1....0..1..0..0....1..1..1..1....0..1..0..1
..1..0..0..1....0..0..0..1....1..1..1..0....0..0..0..0....1..0..0..0
..0..1..0..0....0..1..0..1....0..1..1..1....0..0..0..0....0..0..1..0
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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